archive-zip: support UTF-8 paths

Set general purpose flag 11 if we encounter a path that contains
non-ASCII characters.  We assume that all paths are given as UTF-8; no
conversion is done.

Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/archive-zip.c b/archive-zip.c
index f5af81f904df081002dad46a71be2eca8e3bebab..0f763e8022e24f37fd31be341fef4536709a63d8 100644 (file)
--- a/archive-zip.c
+++ b/archive-zip.c
@@ -4,6 +4,7 @@
 #include "cache.h"
 #include "archive.h"
 #include "streaming.h"
+#include "utf8.h"
 
 static int zip_date;
 static int zip_time;
@@ -16,7 +17,8 @@ static unsigned int zip_dir_offset;
 static unsigned int zip_dir_entries;
 
 #define ZIP_DIRECTORY_MIN_SIZE (1024 * 1024)
-#define ZIP_STREAM (8)
+#define ZIP_STREAM     (1 <<  3)
+#define ZIP_UTF8       (1 << 11)
 
 struct zip_local_header {
        unsigned char magic[4];
@@ -164,6 +166,17 @@ static void set_zip_header_data_desc(struct zip_local_header *header,
        copy_le32(header->size, size);
 }
 
+static int has_only_ascii(const char *s)
+{
+       for (;;) {
+               int c = *s++;
+               if (c == '\0')
+                       return 1;
+               if (!isascii(c))
+                       return 0;
+       }
+}
+
 #define STREAM_BUFFER_SIZE (1024 * 16)
 
 static int write_zip_entry(struct archiver_args *args,
@@ -187,6 +200,13 @@ static int write_zip_entry(struct archiver_args *args,
 
        crc = crc32(0, NULL, 0);
 
+       if (!has_only_ascii(path)) {
+               if (is_utf8(path))
+                       flags |= ZIP_UTF8;
+               else
+                       warning("Path is not valid UTF-8: %s", path);
+       }
+
        if (pathlen > 0xffff) {
                return error("path too long (%d chars, SHA1: %s): %s",
                                (int)pathlen, sha1_to_hex(sha1), path);